1242124005 has 8 divisors (see below), whose sum is σ = 1987398432. Its totient is φ = 662466128.

The previous prime is 1242123979. The next prime is 1242124007. The reversal of 1242124005 is 5004212421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1242124005 - 2⁶ = 1242123941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242124007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41404119 + ... + 41404148.

It is an arithmetic number, because the mean of its divisors is an integer number (248424804).

Almost surely, 2^1242124005 is an apocalyptic number.

1242124005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242124005 is a deficient number, since it is larger than the sum of its proper divisors (745274427).

1242124005 is an equidigital number, since it uses as much as digits as its factorization.

1242124005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82808275.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1242124005 is about 35243.7796639350. The cubic root of 1242124005 is about 1074.9501343374.

Adding to 1242124005 its reverse (5004212421), we get a palindrome (6246336426).

The spelling of 1242124005 in words is "one billion, two hundred forty-two million, one hundred twenty-four thousand, five".